/*
 * The MIT License
 *
 * Copyright 2012 http://generic-toolset.googlecode.com.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.rlpw.util;

import java.util.*;

public class RotationSet<T> {
	private List<T> entries = new ArrayList<>();
	private int count;
	private int last;
	
	public RotationSet() {
		this.setCount(0);
	}
	
	public RotationSet(int count) {
		this.setCount(count);
	}
	
	public boolean add(T item) {
		if (entries.size() < getCount()) {
			entries.add(item);
			return true;
		} else {
			return false;
		}
	}
	
	public void clear() {
		entries.clear();
	}
	
	public boolean isFull() {
		return (getCount() == entries.size());
	}
	
	public T get(int index) {
		last = index % getCount();
		return entries.get(last);
	}
	
	public T next() {
		return get(++last);
	}
	
	public int indexOf(T item) {
		return entries.indexOf(item);
	}
	
	@SuppressWarnings("unchecked")
	public T[] toArray() {
		return (T[]) entries.toArray(); 
	}

	public void setCount(int count) {
		this.count = count;
	}

	public int getCount() {
		return count;
	}

}
